Plate burning process of precise screen

Abstract

The present invention provides a plate burning process of a precise screen. The process employs a way of secondary exposure way to complete the film graphic transfer to the screen, and specifically comprises steps of: A) film production: first compensating the film, then adding composing and positioning to ensure a composing position deviation no more than 100 mum in a secondary plate burning of the screen; B) plate burning: carrying out composing and plate burning according to composing position required by printing, wherein the first plate burning energy set value is a minimum value of the exposure latitude, and the secondary plate burning energy value is set at a peak value of the optimum exposure. The method of the invention employs a parallel light plate burning machine to achieve clear text and effectively control edge jag and side virtual exposure; meanwhile, as the screen is treated with exposure for two times, the exposure energy is sufficient, and the pressrun of the screen film is improved.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a precision screen printing process method. Background technique [0002] Under normal circumstances, there are three methods of screen printing plate making: (1) paint film engraving method, which is a kind of manual plate making method, which is relatively simple; (2) carbon paper printing method, which is also a relatively simple manual plate making method (3) photosensitive plate-making method, the printing plate used for silk screen printing signs requires high precision, and generally adopts advanced direct, indirect, and direct three photosensitive plate-making methods. The screen exposure process is an essential and critical plate-making process in these methods. [0003] Printing means exposure, and printing is the work of photocopying the pictures and texts on the film with pictures and other carriers with high transparency to the screen coated with photosensitive mat...

AI Technical Summary

Problems solved by technology

[0008] 1. The light source of the printing machine is non-parallel light, and side exposure is easy to occur during the screen exposure process (that is, the ultraviolet light passes through the film film obliquely, causing the inner side of the edge of the black film to be exposed and cured)

[0009] 2. The exposure is only carried out once. One exposure needs to take into account the image resolution and printing durability of the precision screen, which cannot be achieved at the same time. Because the exposure energy setting basically cannot choose the best exposure energy peak value, the photosensitive adhesive has not fully developed. Photo-crosslinking reaction, poor printing durability of the plate film

It is difficult to reduce the number of pinholes when one exposure is completed